<!DOCTYPE html>
<html>
<body>
    <h1>JavaScript 函数</h1>
    <p>此例调用 person 的 fullName 方法，在 person1 上使用它：</p>
    <p id="demo"></p>
    <script>
        var person = {
            fullName: function () {
                return this.firstName + " " + this.lastName;
            }
        }
        var person1 = {
            firstName: "Bill",
            lastName: "Gates"
        }
        var person2 = {
            firstName: "Steve",
            lastName: "Jobs"
        }
        var x = person.fullName.call(person1);
        document.getElementById("demo").innerHTML = x;
    </script>
</body>
</html>